This tweet claims a method to bypass a Web Application Firewall (WAF) specifically to exploit Stored Cross-Site Scripting (XSS) vulnerabilities. The author suggests a 'smart idea' for accessing such a bypass but provides no explicit payload or technical details in the tweet itself. Stored XSS occurs when malicious scripts are permanently stored on a target server, such as in a database, and then served to other users. WAFs are designed to detect and block common attack patterns including XSS. Successfully bypassing a WAF for Stored XSS means the attacker can inject malicious scripts that evade detection, potentially causing harm to users through session hijacking, data theft, or other malicious activities. Without specific payloads or vendor details, it is difficult to ascertain the exact technique used. Typically, WAF bypasses may involve encoding payloads, using uncommon characters, or leveraging logic flaws in WAF rule sets. For bug bounty hunters, discovering such bypasses is valuable as it helps in understanding WAF limitations and improving security measures. Overall, this tweet highlights the ongoing cat-and-mouse game between attackers and defenders in web application security, focusing on Stored XSS vulnerability exploitation despite WAF protections.
For more insights, check out the original tweet here: https://twitter.com/bountywriteups/status/1949665835418521802. And don’t forget to follow @bountywriteups for more exciting updates in the world of cybersecurity.